FW17 wrote: ↑05 Feb 2025, 08:40
In the new ground-effect era, where the cars run closer to the ground, the interaction between the car floor and track surface has become a key performance differentiator.
Last summer Ferrari shut down its F1 wind tunnel to install a new ‘rubberised’ rolling road which, while less durable than the conventional steel belt, more accurately reflects the texture of a track surface.
https://www.motorsport.com/f1/news/why- ... /10693462/
Teams have historically used smooth surfaces because it meant the 60% test tyres that Pirelli gave them lasted longer.